John graves



I. GRAVES. EJECTING MECHANISM FOR CORE MAKING MACHINES. I

APPLICATION FILED JAN-25 1919.

- Patent ed June 3, 19 19.

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, hereafter more fully set forth in the speci-' UNI ED sTATEs PATENT OFFICE.

J'oHn GRAVES, or MADISON, Wisconsin, AssmNon-To FRE-NGH'BATTERY & CARBON 00., or MADISON, WISCONSIN, A CORPORATION or WISCONSIN;

EJEQTING MECHANISM FOR CORE-MAKING MACHINES.

To all whom it may concern:

Be it known that I, JOHN GRAvns, a citizen of the United States, residing at Madison, in the county of Dane and State of Wisconsin, have-invented a certain new and useful Improvement in Ejecting Mechanism for Core-Making Machines, of which the fol lowing is a'specification. V This invention relates to machinesv for making cores in which material to 'be molded is tamped by a machineinto a suit-able mold,

from which the finished product is ulti mately ejected by the machine. fThe object of'the invention is to provide a machine of this class which is verysimple in construcfication and claims.

Referring to the drawings, in. which similar numerals indicate the same parts throughout the several views, I v r F'gure 1 is .a side elevation partly 1n section of mechanism illustrating the invention in. its preferred form. v I

Fig. 2 'sa sectional view through the moldmechanism takenfrom the left-v hand side of Fig-1.

Fig. 3 is a plan; detail. view. taken on the irregular line 3-.3,of Fig'l 1.

As shown in the drawings, the machine is carried on a table frame 10, having rising from it a column 12, the whole supported from any suitable standard, not shown in the drawing. 1

Dependin'g from the table 10, heretofore referred to, is ;a bracket '14 carrying at its bottom a vfrontlug16 and a rear lug 18.

Adjustably' secured in the from lug. 16 by suitable nuts 20 and 22 is a stationary plunger 24,. whose upper end 26 forms the bottom of the concentric mold 28 within which the, core ab orme i ned. s H d 28 is embracdd a? elamp 30which is in Specification of Letters Patent.

Patented June 3, 1919'.

' Application filed January 215, 1919. Serial No. 273,184.

turn rigidly secured by screws 32 on a crosshead member 34 reciprocatable in vertical guides 36, formed in the bracket 14. The upward vertical movement of the crosshead 34 with reference to the plunger 24 is regulated and controlled by adjustably positioned screws 38, shown in detail in Fig. 1, these screws themselves being slidable' through the frame bracket member 1014.

As clearly shown inFig. 3, bracket 14 is cast so as to form two parts, through which is a shaft 40 on which, between the parts of the bracket, is mounted the bifurcated lever 4:2Wl1l6l1 straddles member 24 and is pivoted to crosshead 34 on. the pins 46, clearly shown in Fig. 3. Similarly, the opposite end of lever 42 straddles vertical rod 48 and to its separated extremities are attached springs 50, in turn connected to a collar 52 on the lower end of member 48. The result of this construction is that-so long as the parts are in the position of Fig. 1, the springs '50, just described, serve to sustain the rod 48 in the position shown in the drawings, with the tamping tool 54 thereon in the position shown in Fig. 1 clear of the mold 28. The mechanism at the upper end of rod 48 for reciprocating. tool 54 to perform the tamping operation is fully 1 shown, described and claimed in my co=pending application, Serial No. 273,183, filed herewith, and as it forms no part of this particular invention, is not further shown, described or claimed herein.

Connected to lever 42 by means of a pin 56' is a rod 58, reciprocatable through bracket 16, as shown in Fig. 1 This rod 58 is surrounded by a spring 6 0 whi ch serves the function of normally holding lever 42 in the positionshownin Fig. 1 with the mold 28 in the normal position above the end 26 of plunger 24 so that the molding mechanism is ready to receive material to be tam'ped.

As is fully shown, described, and claimed in my copendingappl-ication above referred to, the tamping operation proper is effected by rotating hand-lever 62 and shaft 64 in a counter-clockwise direction from that shown in Fig. 1. As the upper end of rod 48 is at' bracket 18 and adjustable collar 'Z Oon rod 48. This movementtakes place without the motion of rod 48 in any way aflecting lever 4-2 or mold 28. a

When, however, the operator moves lever V 62 about shaft 64 in a clockwise direction as far as rack and pinion member 68 will permit, rod 48 moves substantially upward so that collar 70 strikes the lower adjacent end of lever 42 and rotates that lever in a coun ter-clockwise direction'against the action of spring 60, thus moving crosshead 34 and mold 28 downward with reference to plun-' a different mold. A further advantage lies in the fact that by lowering the mold to eject the finished product, more room is obtained for the hand of the operator between the mold and the tamping tool 54 than is ever possible where the mold is stationary and the finished product is ejected from it.

' Having thus described my invention, what I claim as new and desire to secure by Letters Patent, 'isp- 1. In mechanism of the class described, a reciprocatable tamping tool, a normally fixed plunger in line with the tamping tool, a mold for material to be tamped so located that said plunger forms its bottom, and mechanism for moving the mold member along said plunger away from the tamping tool, for the purposes set forth.

2. In mechanism of the class described, the combination with a suitable supporting frame, a tamping tool reciprocatable with reference to the frame, a plunger member in line with the tamping tool, amold member embracing the plunger member and movably mounted with reference thereto, a single opf 'erating mechanism connected to the tamp ing member and to the mold member adapted to, in moving in one direction, reciprocate the tamping member without affecting the mold and when moved in the opposite direction, withdraw the mold member along the plunger away from the tamping member to eject the product from the mold.

3. In mechanism of the class described, the combination with a suitable support, a plunger member, a mold: member inclosing the plunger member in such a way that the plunger member forms a bottom for the mold during the molding operation, spring mechanism holding the mold member normally in said position, and means for mechanically withdrawing themold' member against said spring holding mechanism to cause the plunger member to e ect the contents from themold; V

4:. In mechanism of the class described, a vertically mounted plunger member, a mold member reciprocatable along said plunger theplunger forms the bottom of the mold during the molding operation and hand op- 'erated i'nechanism for movlng' the mold member against said spring action to a'point where the plunger member ejects the contents of the mold.

6. In mechanism offtheic'lass described, a verticallymounted plunger member, a mold member reciprocatable along said plunger member, spring mechanism normally holding said mold mechanism in a position where the plunger forms the bottom of the mold during the molding. operation, and means adjustably controlling the limit of the upward movement of the mold with reference to the plunger.

7. In mechanism ofthe class described, a vertically mounted plunger member, a mold member reciprocatable along said. plunger member, spring mechanismnormally holding said moldmechanism in a position where the plunger forms the bottom of the mold dur ing the molding operation, and adjustable screw-mechanism controlling the limit its upward movement of themoldwith reference to the plunger. i V 7 8. Mechanism of the class described, the combination with a suitable support, a mold member reciprocatably mounted with reference to the support, a central plunger member for the mold, normally stationary with reference to the support, means for selectively adjusting the position 'of the plunger member with reference to the sup-- 7 port, and means for reciprocating. the mold member with reference to the plunger to thereby cause the tents of the mold.

9. In mechanism of the class described, the combination of a suitable frame, a mold plunger to eject the con member mounted for reciprocation V91? ticallly of said frame, a plunger'member normallyrigid on'the frame, normallyforming the bottom of said mold, a generally horizontal lever pivoted to the frame and connected to the mold mechanism,"sp-ring mechanism normally moving said lever to hold said mold in such a position that the plunger forms the bottom ofthe mold, and manually operated means. carried, the

forth.

frame for moving said lever contrary to the action of said spring, for the purposes set 7 10.1m mechanism of the class described, the combination of a suitable frame, mold member mounted for reciprocation vertically of said "frame, a plunger member nor-' mally rigid onthe frame, normally forming the bottom of'said mold, a generally hori-' zontal lever pivoted to the frame and connected to the mold mechanism,. spring" mechanism normally moving said lever to hold said mold in such a position that the plunger forms the bottom of the mold, a reciprocatable tamping mechanism cooperating With said mold, means movable in one forth to retract the mold along the plunger to eject the product from the mold.-

In Witness whereof, I have hereunto subscribed my namein the presence of tWo Witnesses.

JOHN GRAVES.

Witnesses:

OBERT J. PnnERsoN, BEN W. PARK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

